Stainless Steel S44535
UNS S44535
S44535 is a Ti/Nb-stabilized 26Cr ferritic stainless positioned between Type 439 and the super-ferritics, with higher chromium for improved chloride resistance.
Reference datasheet — S44535 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the ANN condition
S44535 tempers and conditions
S44535 is supplied in 5 conditions, soft to hard. ANN is the default FabDigit quotes; the values on this page are for it.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Welded tube, bright annealed after welding | Condenser/heat-exchanger and exhaust tubing where the weld seam is normalized by post-weld annealing. | 325 | 495 | 26 | 180 HB | 2.7 % IACS |
ANNDefault Annealed | Standard stocked condition for exhaust and heat-exchanger sheet forming and welding. | 330 | 500 | 27 | 180 HB | 2.7 % IACS |
Temper rolled / skin passed | Light cold rolling for improved flatness and reduced roping/stretcher strain in press parts. | 380 | 530 | 22 | 192 HB | 2.7 % IACS |
Cold worked, 1/4 hard strip | For spring-back clips, clamps and shims where higher yield is wanted and forming is mild. | 480 | 610 | 12 | 17 HRC | 2.7 % IACS |
Cold worked, 1/2 hard strip | Maximum practical cold-rolled strength for flat parts; bending must be across the rolling direction. | 590 | 700 | 7 | 25 HRC | 2.7 % IACS |
Supply forms, finishes and certifications
Ways S44535 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
BA | Bright annealed | Surface finish |
HRAP | Hot rolled, annealed and pickled | Surface finish |
What is S44535?
S44535 is a Ti/Nb-stabilized 26Cr ferritic stainless positioned between Type 439 and the super-ferritics, with higher chromium for improved chloride resistance. It is used for exhaust and heat-exchanger sheet, strip and welded tube in ANN, BA, HRAP, temper-rolled and 1/4-hard or 1/2-hard cold-worked conditions; annealed values are 330 MPa yield, 500 MPa tensile, 27 % elongation and about 180 HB (88 HRB). Maximum service temperature is 950 °C, but HAZ grain coarsening lowers toughness and formability (68) trails austenitics — 441/439 grades are the cheaper option where 26Cr is not needed. S44535 has a density of 7.67 g/cm³ (0.277 lb/in³), lighter than 95% of stainless steel grades. It melts at 1,425°C (2,597 °F). S44535 has a yield strength of 330 MPa (47.9 ksi) and a tensile strength of 500 MPa (72.5 ksi) — weaker than 57% of stainless steel grades. Elongation at break is 27% and the elastic modulus is 200 GPa (29 Msi).
What is S44535 used for?
- exhaust systems
- heat exchangers
- hot water equipment
Advantages
- Easy to machine — 52/100, better than 91% of stainless steel grades
- High service temperature — 950°C (1,742 °F), better than 86% of stainless steel grades
- High electrical conductivity — 2.7 % IACS, better than 78% of stainless steel grades
- Conducts heat well — 21 W/m·K (12.1 BTU/hr·ft·°F), better than 76% of stainless steel grades
- Forms and bends easily — 68/100, better than 75% of stainless steel grades
Limitations
- Low fracture toughness — 60 MPa·√m (54.6 ksi·√in), worse than 88% of stainless steel grades
S44535 properties
Typical room-temperature values for S44535-ANN; bars are the position among stainless steel grades.
Physical3
S44535 has a density of 7.67 g/cm³ (0.277 lb/in³), lighter than 95% of stainless steel grades. It melts at 1,425°C (2,597 °F).
Mechanical16
S44535 has a yield strength of 330 MPa (47.9 ksi) and a tensile strength of 500 MPa (72.5 ksi) — weaker than 57% of stainless steel grades. Elongation at break is 27% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
S44535 is rated for continuous service to 950°C (1,742 °F). It conducts heat at 21 W/m·K (12.1 BTU/hr·ft·°F), better than 76% of stainless steel grades. Thermal expansion is 10.4 µm/m·K (5.78 µin/in·°F).
Electrical3
S44535 conducts electricity at 2.7 % IACS, better than 78% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (63/100), better than 53% of stainless steel grades.
Sustainability4
Producing a kilogram of S44535 takes about 50 MJ of energy and emits 4.3 kg of CO₂ — less than 80% of stainless steel grades. Typical recycled content is 75%.
Manufacturability7
S44535's machinability is fair (52/100, better than 91% of stainless steel grades); weldability good (65/100); formability good (68/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the stainless steel family
Yield strength against density for every stainless steel grade FabDigit runs. S44535 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with S44535
Is S44535 easy to machine?
Machines like 430 but gummier: rigid setup, sharp positive-rake carbide, moderate speed with heavy flood coolant to avoid work-hardened smearing.
Can S44535 be welded?
Weldable by GTAW/plasma/laser with low heat input and Ar (no CO2/N2); use matching stabilized or 309L/Ni-base filler, keep interpass low and avoid post-weld sensitizing holds — HAZ grain coarsening lowers toughness.
Can S44535 be formed, bent or molded?
Good deep-drawing and roll-forming at RT thanks to Ti/Nb stabilization; watch ridging/roping, use generous bend radii on thicker gauges and form above ~10 °C.
S44535 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Clow interstitial; stabilized | ≤ 0.03 | 0.02 |
| Si | ≤ 1 | 0.4 |
| Mn | ≤ 1 | 0.4 |
| P | ≤ 0.04 | |
| S | ≤ 0.03 | |
| Cr | 25 – 27.5 | 26 |
| Niresidual | ≤ 0.5 | 0.2 |
| Monot intentionally added in most heats | ≤ 1 | |
| N | ≤ 0.03 | 0.02 |
| Ti+Nbstabilizer, typically ≥ 0.15 + 4×(C+N) | 0.2 – 0.8 | 0.4 |
| Fe | balance |
What surface finishes work on S44535?
Pickle and passivate after hot work; takes bright annealed, brushed or electropolished finishes well — never anodize.
Surface treatments FabDigit runs on stainless steel parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Passivation
Organic Coating
Thermal Spray
How much does S44535 cost?
S44535 is a premium-cost stainless steel ($$$), cheaper than about 51% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
S44535 — frequently asked
What is S44535 used for?
S44535 is typically used for exhaust systems, heat exchangers and hot water equipment. In short: 26Cr stabilized ferritic; 950 °C service capability; better chloride resistance than 439.
What is the yield strength of S44535?
S44535 has a typical yield strength of 330 MPa (47.9 ksi) and a tensile strength of 500 MPa (72.5 ksi) — weaker than 57% of stainless steel grades. Strength varies by condition: see the 5 listed tempers.
Is S44535 easy to machine?
Reasonably — machinability is rated fair (52/100, better than 91% of stainless steel grades). Machines like 430 but gummier: rigid setup, sharp positive-rake carbide, moderate speed with heavy flood coolant to avoid work-hardened smearing.
Can S44535 be welded?
Yes — weldability is rated good (65/100). Weldable by GTAW/plasma/laser with low heat input and Ar (no CO2/N2); use matching stabilized or 309L/Ni-base filler, keep interpass low and avoid post-weld sensitizing holds — HAZ grain coarsening lowers toughness.
What surface finishes work on S44535?
Pickle and passivate after hot work; takes bright annealed, brushed or electropolished finishes well — never anodize.
Can S44535 be formed, bent or molded?
Good deep-drawing and roll-forming at RT thanks to Ti/Nb stabilization; watch ridging/roping, use generous bend radii on thicker gauges and form above ~10 °C.
What is the maximum service temperature of S44535?
S44535 is rated for continuous use to about 950°C (1,742 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between S44535-ANN and S44535-TR?
ANN is the default condition — standard stocked condition for exhaust and heat-exchanger sheet forming and welding. TR: light cold rolling for improved flatness and reduced roping/stretcher strain in press parts. Yield strength is 330 MPa in ANN versus 380 MPa in TR.
How much does S44535 cost?
S44535 is a premium-cost stainless steel ($$$), cheaper than about 51% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- ASTM A240/A240M — Chromium and Chromium-Nickel Stainless Steel Plate, Sheet and Strip — ASTM International (2023)
- SAE J405 — Chemical Compositions of SAE Wrought Stainless Steels — SAE International (2013)
- ASTM A959 — Harmonized Standard Grade Compositions for Wrought Stainless Steels — ASTM International (2022)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol.13B — Corrosion: Materials — ASM International (2005)
- High-chromium stabilized ferritic stainless sheet data (exhaust/heat-exchanger grades) — Outokumpu / JFE / Nippon Steel (2022)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.